3.9 Plus 15 Addition :

Number 1	Number 2	Answer
3.9	15	18.9

How to calculate 3.9 plus 15 ?

Let's break down the addition of 03.9 and 1500 step by step:

   03.9      <-- Start with the rightmost column
+  1500
---------

    Add the digits in the rightmost column:
        9 + 0 + 0 = 9
        Write down 9 in the rightmost column, carry over 0 to the next column.

   03.9
+  1500
---------
     9


    Add the digits in the rightmost column:
        3 + 5 + 0 = 8
        Write down 8 in the rightmost column, carry over 0 to the next column.

   03.9
+  1500
---------
     8.9


    Add the digits in the rightmost column:
        0 + 1 + 0 = 1
        Write down 1 in the rightmost column, carry over 0 to the next column.

   03.9
+  1500
---------
     18.9

    Continue to the left:
        There are no more columns to the left.

The final result is 18.9.

Similar Summation Operations :

Number 1	Number 2	ANSWER:	HOW TO ?
4	17	21	4 plus 17
4.1	21	25.1	4.1 plus 21
4.2	30	34.2	4.2 plus 30
0.4	4.2	4.6	0.4 plus 4.2
5.4	5	10.4	5.4 plus 5
3	8.6	11.6	3 plus 8.6